java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-03 02:35:04,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:35:04,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:35:04,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-03 02:35:04,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-03 02:35:04,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-03 02:35:04,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-03 02:35:04,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-03 02:35:04,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-03 02:35:04,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-03 02:35:04,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-03 02:35:04,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-03 02:35:04,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-03 02:35:04,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-03 02:35:04,736 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-03 02:35:04,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-03 02:35:04,751 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:35:04,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:35:04,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:35:04,752 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:35:04,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:35:04,753 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:35:04,753 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:35:04,753 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:35:04,753 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:35:04,753 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:35:04,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:35:04,754 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:35:04,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:35:04,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:35:04,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:35:04,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:35:04,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:35:04,755 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:35:04,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:35:04,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:35:04,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:35:04,756 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:35:04,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:35:04,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:35:04,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:35:04,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:35:04,757 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:35:04,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:35:04,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:35:04,758 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:35:04,786 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:35:04,799 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:35:04,802 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:35:04,804 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:35:04,804 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:35:04,805 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2019-10-03 02:35:04,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce3546d68/0875b865209d4d53804d7ab5aacdecc6/FLAGab128951c [2019-10-03 02:35:05,321 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:35:05,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2019-10-03 02:35:05,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce3546d68/0875b865209d4d53804d7ab5aacdecc6/FLAGab128951c [2019-10-03 02:35:05,693 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce3546d68/0875b865209d4d53804d7ab5aacdecc6 [2019-10-03 02:35:05,702 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:35:05,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:35:05,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:35:05,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:35:05,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:35:05,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:35:05" (1/1) ... [2019-10-03 02:35:05,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b354496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:05, skipping insertion in model container [2019-10-03 02:35:05,713 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:35:05" (1/1) ... [2019-10-03 02:35:05,720 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:35:05,737 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:35:05,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:35:05,916 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:35:05,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:35:06,057 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:35:06,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:06 WrapperNode [2019-10-03 02:35:06,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:35:06,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:35:06,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:35:06,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:35:06,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:06" (1/1) ... [2019-10-03 02:35:06,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:06" (1/1) ... [2019-10-03 02:35:06,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:06" (1/1) ... [2019-10-03 02:35:06,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:06" (1/1) ... [2019-10-03 02:35:06,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:06" (1/1) ... [2019-10-03 02:35:06,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:06" (1/1) ... [2019-10-03 02:35:06,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:06" (1/1) ... [2019-10-03 02:35:06,127 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:35:06,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:35:06,128 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:35:06,128 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:35:06,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:35:06,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:35:06,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:35:06,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:35:06,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:35:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:35:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-03 02:35:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:35:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-03 02:35:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:35:06,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-03 02:35:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-03 02:35:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-03 02:35:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-03 02:35:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:35:06,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:35:06,499 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:35:06,500 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-03 02:35:06,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:35:06 BoogieIcfgContainer [2019-10-03 02:35:06,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:35:06,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:35:06,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:35:06,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:35:06,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:35:05" (1/3) ... [2019-10-03 02:35:06,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e2325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:35:06, skipping insertion in model container [2019-10-03 02:35:06,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:35:06" (2/3) ... [2019-10-03 02:35:06,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e2325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:35:06, skipping insertion in model container [2019-10-03 02:35:06,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:35:06" (3/3) ... [2019-10-03 02:35:06,509 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2019-10-03 02:35:06,521 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:35:06,534 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:35:06,567 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:35:06,602 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:35:06,602 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:35:06,603 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:35:06,603 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:35:06,603 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:35:06,603 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:35:06,603 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:35:06,603 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:35:06,617 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-10-03 02:35:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-03 02:35:06,627 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:06,627 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:06,629 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash -99599224, now seen corresponding path program 1 times [2019-10-03 02:35:06,637 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:06,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:06,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:06,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:06,688 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:35:06,783 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:35:06,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-03 02:35:06,783 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:35:06,788 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-03 02:35:06,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-03 02:35:06,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:35:06,807 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2019-10-03 02:35:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:06,828 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2019-10-03 02:35:06,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-03 02:35:06,830 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2019-10-03 02:35:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:06,841 INFO L225 Difference]: With dead ends: 35 [2019-10-03 02:35:06,841 INFO L226 Difference]: Without dead ends: 28 [2019-10-03 02:35:06,844 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:35:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-03 02:35:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-03 02:35:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-03 02:35:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-03 02:35:06,887 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2019-10-03 02:35:06,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:06,888 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-03 02:35:06,888 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-03 02:35:06,888 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-03 02:35:06,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-03 02:35:06,890 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:06,890 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:06,890 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:06,891 INFO L82 PathProgramCache]: Analyzing trace with hash 930552028, now seen corresponding path program 1 times [2019-10-03 02:35:06,891 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:06,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:06,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:06,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:06,894 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:35:07,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:35:07,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-03 02:35:07,010 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:35:07,011 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-03 02:35:07,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-03 02:35:07,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-03 02:35:07,012 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-10-03 02:35:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:07,101 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-10-03 02:35:07,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-03 02:35:07,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-03 02:35:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:07,105 INFO L225 Difference]: With dead ends: 36 [2019-10-03 02:35:07,106 INFO L226 Difference]: Without dead ends: 36 [2019-10-03 02:35:07,107 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-03 02:35:07,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-03 02:35:07,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-10-03 02:35:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-03 02:35:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-03 02:35:07,115 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2019-10-03 02:35:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:07,115 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-03 02:35:07,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-03 02:35:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-03 02:35:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-03 02:35:07,117 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:35:07,117 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:35:07,118 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:35:07,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:07,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1358146588, now seen corresponding path program 1 times [2019-10-03 02:35:07,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:35:07,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:07,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:35:07,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:35:07,121 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:35:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:35:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-03 02:35:07,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:35:07,199 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:35:07,200 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2019-10-03 02:35:07,202 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [23], [29], [31], [33], [37], [41], [46], [49], [55], [60], [63], [72], [79], [91], [95], [98], [100], [106], [107], [108], [110] [2019-10-03 02:35:07,240 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:35:07,240 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:35:07,298 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-03 02:35:07,300 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 29 variables. [2019-10-03 02:35:07,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:35:07,303 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-03 02:35:07,344 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-03 02:35:07,344 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-03 02:35:07,346 INFO L420 sIntCurrentIteration]: We unified 27 AI predicates to 27 [2019-10-03 02:35:07,347 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-03 02:35:07,347 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-03 02:35:07,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-10-03 02:35:07,348 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:35:07,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-03 02:35:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-03 02:35:07,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:35:07,349 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 2 states. [2019-10-03 02:35:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:35:07,350 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-10-03 02:35:07,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-03 02:35:07,350 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2019-10-03 02:35:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:35:07,351 INFO L225 Difference]: With dead ends: 6 [2019-10-03 02:35:07,351 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:35:07,352 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-03 02:35:07,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:35:07,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:35:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:35:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:35:07,353 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2019-10-03 02:35:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:35:07,353 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:35:07,353 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-03 02:35:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:35:07,353 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:35:07,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:35:07 BoogieIcfgContainer [2019-10-03 02:35:07,359 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:35:07,362 INFO L168 Benchmark]: Toolchain (without parser) took 1656.62 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 86.1 MB in the beginning and 113.5 MB in the end (delta: -27.4 MB). Peak memory consumption was 39.7 MB. Max. memory is 7.1 GB. [2019-10-03 02:35:07,362 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory is still 104.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-03 02:35:07,363 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.64 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 86.1 MB in the beginning and 178.8 MB in the end (delta: -92.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. [2019-10-03 02:35:07,364 INFO L168 Benchmark]: Boogie Preprocessor took 67.84 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 176.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-10-03 02:35:07,365 INFO L168 Benchmark]: RCFGBuilder took 373.33 ms. Allocated memory is still 200.8 MB. Free memory was 176.6 MB in the beginning and 158.4 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2019-10-03 02:35:07,366 INFO L168 Benchmark]: TraceAbstraction took 856.56 ms. Allocated memory is still 200.8 MB. Free memory was 157.5 MB in the beginning and 113.5 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:35:07,370 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 133.7 MB. Free memory is still 104.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 354.64 ms. Allocated memory was 133.7 MB in the beginning and 200.8 MB in the end (delta: 67.1 MB). Free memory was 86.1 MB in the beginning and 178.8 MB in the end (delta: -92.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.84 ms. Allocated memory is still 200.8 MB. Free memory was 178.8 MB in the beginning and 176.6 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 373.33 ms. Allocated memory is still 200.8 MB. Free memory was 176.6 MB in the beginning and 158.4 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 856.56 ms. Allocated memory is still 200.8 MB. Free memory was 157.5 MB in the beginning and 113.5 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 1 error locations. SAFE Result, 0.7s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 73 SDtfs, 5 SDslu, 20 SDs, 0 SdLazy, 18 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9166666666666666 AbsIntWeakeningRatio, 0.9259259259259259 AbsIntAvgWeakeningVarsNumRemoved, 0.2222222222222222 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 1907 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...